<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../vue.js"></script>
</head>
<body>
    <div id="app">
        <div ref="self">test</div>
    </div>

    <script>
        var vm = new Vue({
            el:'#app',
            data:{msg:'张三'},
            beforeDestroy () {
                console.log('销毁之前')
                console.log(this.$refs.self)
                console.log(this.msg)
                console.log(vm)
            },
            destroyed () {
                console.log('销毁之后')
                console.log(this.$refs.self)
                console.log(this.msg)
                console.log(vm)
            }
        })
    </script>
</body>
</html>